A Data Systems Developer designs, implements, and manages software solutions for organizing and analyzing data. They are responsible for designing databases, ensuring system security and data integrity, and optimizing system performance. They also develop algorithms and conduct statistical analysis. They work closely with data scientists and analysts to understand data needs and deliver systems that can effectively handle large data sets. Additionally, they troubleshoot and resolve any issues in the data system, ensure smooth data processing, and often participate in the decision-making processes regarding the selection and application of data tools and systems.